Bitstock



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BIT STOCK v Filed May 23, 1946 4 enuesr cum/m INVENTOR ATTORNEY$ Patented July 18, 1950 UNITED STATES PATENT OFFICE BITSTOCK Ernest Curran, Flushing, N. Y.

Application May 23, 1946, Serial No. 671,669

of a device of this kind which may be operated by the use of but one hand.

A further object of the invention is the provision of a novel means for holding various tools which may be utilized with the device.

Another object is the provision of a device of this kind which may be operated in either a clockwise or counterclockwise direction without the consequent loosening of tools when force is applied to the device.

Other and further objects of the invention will become apparent from a reading of the following specification, taken in conjunction with the appended claim.

In the drawings:

Figure 1 is an elevational view of a device embodying the invention, f

Figure 2 is a detail view of a modified form of the invention, v

Figure 3 is a view similar to Figure 2 showing another form the invention may take,

Figure 4 is an enlarged sectional view disclosing details of the invention, and

Figure 5 is a sectional view taken along line 5-5 of Figure 4.

Referring more particularly to the drawings, there is shown therein a tool including a shank I0, one end of which has revolubly mounted thereon an operating handle II. It will'be seen that the shank Iii penetrates nearly the entire handle and that there is provided a metallic liner I2 for furnishing a bearing for the shank when the tool is in operation. A lock washer I3 is clamped in a groove at the extreme end of the shank, thereby preventing the handle from accidental removal from the shank.

To the other end of the shank is permanently afiixed by electrical welding or the like, a bracket I4. A chuck body I5 is carried by the bracket and is provided with the customary jaws I6. The jaws are actuated by a threaded shaft I1 which is adapted to be turned by means of an integrally formed olfset locking handle I8, or, as shown in the modifiedform in Figure 2, by a wing nut IS. The bracket I4 is threaded upon the threaded shaft as indicated in Fig. 4 and will serve to lock the shaft in its tightened position upon the jaws I6 and to render the shank II] rigid upon chuck body I5. A washer 2| lies under the bracket It to permit the easy turning of the bracket upon In the form of the invention shown in Figure 3, the shank I0 is embedded or otherwise affixed to the body of the chuck I5 and the shank I1 is provided with a screw head 22 for actuating the same.

In the form shown in Figure 4, the shank I0 is afiixed to shaft I1 and the chuck is of the type having separators 23 formed integrally with the shaft II. In this instance, it will be apparent that a movement of the shank III will cause a rotation of the entire chuck once a tool has been locked therein. A member I4 is threaded upon shaft I1 and serves to lock shaft II in its adjusted position upon jaws I6.

In operation, it will be apparent that a selected tool may be locked in the jaws It by turning the locking handle I8, wing nut I9, or screw head 22, and that thereupon the operating handle Il may be grasped in one hand and rotary motion be imparted to the tool by moving the hand in a circular motion, keeping the wrist substantially motionless.

While only certain forms of the invention have been shown and described herein, it will be apparent to those skilled in the art that many minor modifications may be made without departing from the spirit of the invention or the scope of the appended claims.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

In a device of the character described, a chuck body having a central bore with threaded and unthreaded parts, jaws adjustable in the unthreaded part and adapted to grasp a tool, a threaded shaft adjustable in the threaded part of the bore to lock said jaws upon the tool, manipulable means for turning said shaft, a bracket threaded upon said threaded shaft to'lock the threaded shaft to the chuck body in itsadjusted position upon the jaws, an. operating handle including a shank having on its upper portion a rotatable hand gripelement, said shank having a lower portion disposed at an angle to the longitudinal axis of said chuck, there being an interposed connecting bend between the upper and lower portions, said lower portion being connected to the bracket.

ERNEST CURRAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 872,048 Broad Nov. 26, 1907 1,642,569 Winslow Sept. 13, 1927 1,674,223 Rabut June 19, 1928 2,277,961 Detmers Mar. 31, 1942 

